• Password protection;
  a password concept protects the user program from unauthorized access.
• Block encryption;
  by means of S7 Block Privacy, the functions (FCs) and function blocks (FBs) can be stored in the CPU in encrypted form to protect the know-how of the application.
• Diagnostics buffer;
  the last 500 error and interrupt events are buffered for diagnostic purposes, of which 100 are stored retentively.
• Maintenance-free data backup;
  the CPU automatically saves all data (up to 128 KB) in case of power failure so that the data are available again unchanged when the power returns.

Parameterizable attributes

STEP 7 can be used to parameterize both S7 configurations and the properties and responses of the CPUs:

• I/O setup: Type and scope
• General: Defining the name, plant designation, and location designation
• Start-up: Defining the startup characteristics of the CPU and the monitoring time
• Synchronous cycle interrupts: Setting of DP master system/IO system number, process image partition number, and delay time
• Cycle/clock memory: Defining the maximum cycle time and load as well as self-test functions. Setting the clock memory address
• Retentivity: Definition of the number of retentive bit memories, counters, timers and data blocks
• Time-of-day interrupts: Setting the start date, start time, and periodicity
• Cyclic interrupts: Setting of periodicity
• System diagnostics: Definition of the handling and scope of diagnostic messages
• Clock: Setting the synchronization method in the AS or on the MPI
• Protection level: Specifying the access rights to programs and data
• Communication: Reserving the connection resources
• Web: Settings for the Web server of the CPU
• MPI/PROFIBUS DP interface: Setting the interface type. Defining the node addresses. Parameterizing the operating mode and configuring the transfer areas in the case of PROFIBUS DP. Parameterizing the time synchronization
• PROFIBUS DP master/slave interfaces: Free address assignment for distributed I/O. Parameterizing the operating mode and configuring the transfer areas in the case of PROFIBUS DP. Parameterizing the time synchronization
• PROFINET interface: Setting the addresses. Parameterizing the PROFINET properties, the I-Device functionality on PROFINET, the time synchronization using the NTP procedure, the media redundancy, and the KeepAlive function
• Parameterizing Port 1, Port 2 and Port 3

Display and information functions

·   Status and error indications:
LEDs indicate, e.g., hardware, programming, time, I/O or bus errors, as well as operating states such as RUN, STOP and restart. Maintenance alarm and PROFINET link/activity.

·   Test functions:
the programming device can be used to display signal states in program execution, modify process variables independently of the user program, and read out the contents of stack memories.

·   Information functions:
you can use the programming device to obtain information about the storage capacity and operating mode of the CPU as well as the current utilization of the main and load memories, current cycle times and diagnostic buffer contents in plain text.

Integrated communication functions

• PG/OP communication
• Shared data communication
• S7 basic communication
• S7 communication
• S5-compatible communication
• Routing
• Data set routing
• PROFIBUS DP master/slave
• Open communication over TCP/IP, UDP and ISO-on-TCP (RFC1006)
• PROFINET IO Controller
• PROFINET I-Device
• PROFINET CBA
• Web server

System functions

The CPU offers a host of extensive system functions for diagnostics, parameterization, synchronization, interrupts, time measurement, etc. Please refer to the manual for details